The Ultraviolet Grasslands (UVG) is a caravan-crawl campaign designed by Lukas Rejec. If you’re not already familiar with UVG, this whole post will probably make more sense if you read my review of the setting first.

Short version: There’s a network of nodes. Each node (or destination) is a potential market where PCs can buy or sell trade goods. One form of play in the caravan-crawl is discovering profitable trade routes between destinations (where you can buy a trade good at a low price in one destination and then sell it at a high price in another destination).

The PCs can use market research to determine the prices for trade goods. UVG has two different systems for market research: One described in the free PDF Ultraviolet Grasslands: Introduction and another in the full-fledged Ultraviolet Grasslands and the Black City.

UVG INTRODUCTION – MARKET RESEARCH

In the Introduction system, PCs can spend 1 day learning the price of a trade good in an adjacent location or 1 week to figure out the price of trade goods in up to three chained locations. For each location, they make a market check sing an appropriate skill and the result determines the price factor for that location (e.g., a result of 8 gives a price factor of 1 for the location; a result of 17 gives a price factor of 1.5). You multiply the base cost of the trade good by the price factor to determine how much it sells for in that location.

There are two things I like about this system:

• It’s simple and straightforward. Almost effortless.
• It requires zero prep. In fact, it’s specifically designed to be used during play, generating only those results which are relevant to the PCs.

The problem with the system is that the prices are dependent on the PCs’ skill check. At the most trivial level, this means that as the PCs increase their skill bonuses, prices will inflate across the grasslands. You’ll also get some weird plateauing effects where certain chart results drop below the minimum possible result.

UVG & THE BLACK CITY – MARKET RESEARCH

At first glance the system in Ultraviolet Grasslands and the Black City appears fairly identical to that from the Introduction. In practice, however, the system has received several tweaks which, speaking frankly, are almost entirely to its detriment.

First, a cash cost has been added to the time cost of market research. This is just fine and the intention is to probably discourage PCs from simply camping out in a “safe” destination and just grinding out market research.

Second, although the system still allows the PCs to focus their market research on a specific destination (or destinations), it can now produce results like, “Three stops away a place pays x4.” This seems fine, but in practice it muddies things up considerably by creating non-specific results. In addition, since there’s no way to directly generate these x4, x5, and x6 results for a location directly (only at a distance), the system inadvertently incentivizes the PCs to NOT explore the caravan routes and instead grind market research in the locations closest to Violet City (their origin point) in the hope of generating high reward locations as close as possible.

Third, key results are now seeded onto the results table, which makes the plateauing problem a lot worse. For example, a result of 7 determines that the location produces the trade good in question. That means anyone with a +7 skill check modifier will no longer generate locations that produce trade goods, completely warping the trade map. (How soon could that happen? Theoretically, a 2^nd level character.)

Fourth, they accidentally broke the system. The Introduction system could indicate that the trade good could not be sold in a particular destination (generally due to the market being saturated with local products), but indicated that the price factor in these locations was still 1 (meaning that the PCs could buy the trade goods there at their base price).

In the Black City system, these scenarios are instead modeled with a price factor 0. But remember that you multiply the price by the price factor, so a price factor of 0 means that the price will also be 0. So, for example, you can get a result of, “But they produce it here. New source, cool.” paired to a price of 0. (And it’s unclear whether that means you can’t buy it even though it’s a new source, or if they’re just giving it away for free. But either is broken.)

Note: Now that I’ve spent a considerable amount of time ripping apart one small sub-system of UVG, I do want to take a moment to say that this is no way representative of the overwhelming quality of the book as a whole. (Seriously. Go read my review.) I would not be spending so much time working on such a relatively tiny element if it wasn’t part of a well-oiled machine.

REVISED MARKET RESEARCH

The core problem with the existing market research system is that the PC’s skill check is determining the local market price. Instead, we need to generate the demand separately from the skill check to learn the demand.

• Spend 1 day and make an Easy (7) skill check to determine the market price for a specific trade good in your current location. If you succeed at a Very Hard (18) skill check, you gain advantage on your haggling check (see UVG, p. 176; you’ve found lead that may be more lucrative than the base local price).
• Spend 1 week and make an Easy (7) skill check to determine the market price for a specific trade good in one adjacent location. For every 4 points of margin of success on the check, determine the market price in an additional adjacent location. (These adjacent locations can be built out in one or more chains, with the second being adjacent to the first, and so forth.)

Design Note: I’m using difficulty numbers calculated for UVG. If you’re using 5E, you can translate these to DCs based on the descriptive values (Easy = DC 10, for example).

VARIANT – RESEARCH COST: As noted above, Ultraviolet Grasslands and the Black City added a cost to these actions. You can do the same here: Local research (1 day) costs cash = local expenses. Regional research (1 week) costs cast = 5 x local expenses.

Alternatively, or in addition to this, you could give bonuses to the check if the PCs are spreading cash around. I proposed a similar system for bribing here, and you could basically use the same structure while swapping out “bribe value” for “local expenses” in UVG.

DETERMINING LOCAL PRICE – SIMPLE VERSION

To determine the local price for a trade good, simply roll on this table:

VARIANT – MARKET FLUCTUATIONS: Once per month (every 4 weeks) or between each session, check all locations with known market prices. There is a 1 in 10 chance that 1d4 prices in that location have changed. Reroll on the table.

Design Note: You may need to play with the frequency of these tests and/or the rate of change to get a satisfactory result.

DETERMINING LOCAL PRICE – COMPLEX VERSION

… but not ultra-complex.

This system determines prices by establishing the original source(s) for a trade good and then calculating local prices based on the market’s proximity to the source. It is more time-consuming, but I don’t think significantly so.

GENERATE SOURCES: Each trade good has 1d4-1 sources in the Ultraviolet Grasslands. (If there are zero sources in the grasslands, then the Violet City is treated as the source, although most likely because it is being shipped from somewhere in civilization.)

For each source, roll 1d30+1 to generate a random destination (this excludes the Violet City and the Black City).

The price factor of a trade good at its source is 1. Haggling checks to sell are made at disadvantage and haggling checks to buy are made at advantage.

CALCULATE PRICE – EASY VERSION: When the PCs do market research in a location, determine the number of weeks of travel between the location and the closest source of the trade good. The price factor increases by +1 for every two weeks of travel, to maximum of 6.

Design Note: The advantage of this method is that it be done as quickly as you can count spaces on the map. However, it will create a very uniform (i.e., boring) experience. Like a dungeon featuring perfect symmetry, there will be considerably less interest in exploration and market research will be generally devalued.

CALCULATE PRICE – STEPPED VERSION: When the PCs do market research in a location, determine the shortest path between the location and the closest source of the trade good. For each week of travel along this path, modify the price factor by 1d4-2. This cannot reduce the price factor below 1, nor above 5.

SPECIAL MARKETS: 1 in 6 markets will have a special relationship with the trade good. Roll 1d8 on the table:

Design Note: Rolling again twice on this table may create strange combinations. (For example, Taboo + High Demand. Or Illegal + Taxed.) Seize the opportunity to creatively explain the discrepancy. For example, if the goods are illegal, who’s charging the tax? A local crime syndicate? A strange goddess who haunts the village?

At the edge of the Rainbowlands stands the Violet City, the last bastion of civilization upon the edge of the ultraviolet grasslands. Even the civilized lands of this world are strange and alien to our eyes — teeming with a multihued humanity (of greenlanders, bluelanders, etc.), porcelain princes (who simultaneously live in multiple bodies psychically linked), body-hopping ultras, and cat lords — and here, where it comes to an end, the setting teems with a fever dream of the fantastic.

The premise of Luka Rejec’s Ultraviolet Grasslands is that the PCs will form a caravan which journeys out into these strange lands and then returns.

The group will start by selecting their reason for journeying into the grasslands. In addition to obviously motivating the expedition, this also determines how the group earns XP. Twelve default options are provided. For example:

• To make money. Provide the party with a financier that loans them the money for their first caravan (and creates a debt), then consider awarding 1d6 x 100 XP for every new profitable trade route discovered, and for every profitable trade completed.
• To learn the ancient secrets. A reason that should appeal to wizards. Give each destination a 20% chance of having lore and remains that lead to the discovery of an ancient secret. Once five pieces are recovered, a wizard can spend a week to research the lore and figure out the Teleportation of Innocents or perhaps the secret of Liquid Stone Lamps. Consider awarding 1d6 x 200 XP for every such secret learned.

The grasslands themselves are not trackless wastes. There are established routes and the players will have a map of 32 branching locations leading from the edge of the grasslands to the strange ruins of the Black City on the edge of an oily sea. Here’s one slice of what this map looks like:

The destinations indicated on the map are vast distances apart (the numbers on the trails between them indicate weeks of travel to reach them). You can think of each destination as a distinct point of light; or as the hub of a wheel, with different discoveries (i.e., adventure locations) available as spokes off of them. A simple structure is given for the PCs to make discoveries from the destination they’re currently in, and the intention is that they will add these discoveries to the map. (You can imagine it slowly expanding in detail as the campaign continues.)

Caravan travel itself is given an elegant, streamlined system consisting of:

• Time (simplified to weeks of travel, with each week given a specific resolution sequence you can easily walk through while making meaningful decisions)
• Inventory (with a simple system of “sacks” that make it easy to manage a caravan without getting bogged down in bookkeeping)
• Supplies & Survival (again, simplified to make it easy to manage an entire caravan of hirelings and pack animals)

The beauty of this is its robust simplicity. What I’m going to call Rejec’s caravan-crawl deserves to be ensconced alongside dungeoncrawls and hexcrawls as a pillar of the RPG artform. It’s an elegant and compelling scenario structure: Rejec provides a clean framework which GMs can fill with content, coupled to a clean set of default actions linked directly to a plethora of potential default goals.

The key insight, in my opinion, is the expectation that the PCs will travel these caravan routes again and again and again. If the goal of the structure was to simply travel from one end of the caravan route to the other (e.g., from the Violet City to the Black City), then you’d be looking at Choose Your Own Adventure prep, and it would be difficult to justify prepping all this branching content when most of it would never be experienced. But because the PCs will constantly be engaging and re-engaging the Ultraviolet Grasslands, all of that material become relevant.

In theory, this is obvious: Both megadungeons and hexcrawls follow similar principles, justifying expansive prep with the expectation that the material will be constantly re-engaged. In practice, though, this is non-trivial to achieve. Although you could simply mandate that the PCs mount multiple expeditions, this can easily decay into a monotonous grind. (You can see a similar problem crop up when people try to run megadungeons as if they were traditional dungeons and expect the PCs to “clear the dungeon.”)

Rejec structures and incentivizes re-engagement with the grasslands in three ways:

First, the Supply & Survival system forces the PCs to return to civilization to resupply (or to explore the trade routes in order to find places where they can re-supply along the way). Even if their ultimate goal were to simply “reach the Black City,” they would still need to repeatedly engage the grasslands in order to achieve that goal.

Second, by making each point on the branching routes an exploration hub surrounded by a cluster of discoveries (which could be theoretically expanded infinitely), Rejec ensures that the PCs don’t exhaust the routes. Like (Re-)Running the Megadungeon, re-engaging the material is always fresh and interesting; not simply a rote repetition.

Third, as a final fillip, Rejec adds a simple Trade & Goods structure. Using this structure, GMs can procedurally generate demand & supply, while the PCs can use market research to figure out the best places to sell their stuff. I have a few minor quibbles about this system (see below), but it creates a systemic pull that encourages players to explore the totality of the trade network.

Then, on top of that, Rejec provides a system for Milk Runs! “If the heroes figure out a milk run, where they can just travel the same journey over and over for profit… let them, but this is boring. Abstract this into a route a henchperson can handle, and roll for cash and complications every year.” So if the system designed to encourage the PCs to explore ever produces an error state where it starts encouraging them to do stuff that’s boring, Rejec provides a solution! This is brilliant!

Oh! Also! Starter caravans! Rejec provides a selection of pre-built caravans custom-tailored for specific purposes (scout, small trader, dungeon exploration expedition, etc.), so that you can just pick one and immediately start playing.

GLORIOUS GRASSLANDS

Laying aside how excited the book makes you to put a caravan together, the setting itself is absolutely enchanting. The book draws you in and conjures the grasslands before your mind’s eye in an alluring, all-captivating vision. It’s not just the art — which is gorgeous; landscapes like a young Hal Foster on an acid trip with characters designed by P. Craig Russell. The text positively vibrates from all of the rich ideas and evocative imagery Rejec has crammed between the covers. By the time I finished reading, I wanted to be out there exploring immediately.

Honestly, just a sample of the place names should be enough to stir the imagination:

• The Bone Mines of Moy Sollo
• The Death-Facing Passage
• The Cauldron of Revitalized Divinity
• The Grass Colossus
• The Porcelain Citadel
• The Cliff Villages of Ghost and Clan

There is a distinctive attitude and vision which simply leaps off the page. Groping for antecedents to compare the grasslands to, I suggest that this might be what you’d end up with if Hayao Miyazaki adapted Gene Wolfe’s Book of the New Sun: It embodies a seemingly impossible nostalgia for something so alien it shouldn’t be able to resonate with our own sense of a lost past… and yet somehow does, capturing a serene beauty which is nevertheless filled with pulse-pounding savagery.

What impresses me most, though, is how incredibly accessible it all feels. The RPG industry is filled with any number of incredibly ornate and wonderful settings that are incredibly difficult to bring to the table because of how much effort it takes to onboard the entire group (Tékumel being the granddaddy of them all). But despite how fresh and unique and deep the Ultraviolet Grasslands are, I nevertheless feel that I could sit down and start playing this with little more effort than any other game of D&D.

Maybe there’s something alchemical about the borderlands — about the place where civilization (any civilization) falls away — that frees us to explore this strange and wonderful wonderland with eager and open eyes. Or perhaps it’s because Rejec encapsulates so much of the setting into immediately utilitarian elements (like equipment lists) that the players will engage with in play while making the discovery of the rest of the setting de rigeur the object of play itself.

But whatever the case, what Ultraviolet Grasslands overwhelmingly instills in me is a sense of not only how gameable it is, but how much I want to game it right now.

WHERE TO BEGIN?

There are a couple ways to begin exploring the Ultraviolet Grasslands. First, there is Ultraviolet Grasslands: Introduction, which is a free 80-page PDF. Second, there is the full-fledged Ultraviolet Grasslands and the Black City which is the full enchilada.

Theoretically, if you buy the full book, you should have no need for the Introduction. But I am going to STRONGLY RECOMMEND that even if you rush out and buy a copy of the Ultraviolet Grasslands and the Black City immediately upon finishing this review (and you should), that you should still start by reading the 80-page Introduction.

Why? Well… Remember that beautiful, crystal clear structure I was raving about? In the full book it gets a little… muddled.

First, the full book has opted to move all the location descriptions to the front of the book “for easier reference during campaign play.” Which makes sense from a certain point of view. But without the context of the structure for which this material was designed, it’s somewhat dizzying in its presentation.

Second, even once you get to the mechanical portion of the book, the material has lost focus on the core structure. In Whither the Dungeon? I talked about how D&D originally included a clear structure for running dungeon adventures, passed through a middle period where the rulebooks still included all the rules without the clear structure, and then eventually arrived at 5E where knowledge of the structure had so atrophied and/or become engrained in the designers that they even forgot to teach DMs how to key a map. It’s interesting watching UVG more or less jump from Stage 1 to Stage 2 of that process for caravan-crawls in roughly 18 months.

If you’re already familiar with the caravan-crawl structure (which you can easily be by reading the Introduction), then it’s easy to see where all of the mechanical gewgaws in the full book — including a lot of new mechanical options — fit into that structure. But if you aren’t, then the full book notably lacks that guidance.

Here’s one small example: Remember the Starter Caravans I mentioned above? In the full book they’re relabeled “Sample Caravans” and the explanation of their purpose (“if you want to skip planning and optimization”) is no longer found in the text. This may seem like a small and perhaps even insignificant change, but in practice I think it’s actually very significant. And even moreso when we’re talking about larger, more pervasive, and more innovative structures.

Similarly, there are a few places where I think the simpler systems of the Introduction are to be preferred. The system for market research is a notable example that I mentioned above: In both versions of the system, it’s problematic that the character’s skill check determines the demand for a trade good in a location (rather than discovering that demand). But the system in the full book really doubles down on this, completely eliminating the aspect of the system where players investigate specific markets. (Instead, they just make a check and get results like, “They need it, but three stops away a place pays x4.”) Systemically this both flattens the results and is significantly less useful to me as a GM.

The full book also includes the SEACAT system, an OSR fantasy system with a fair degree of deviation from D&D. It seems fine, but mostly leaves me cold, so that the best thing I can say about it is that it only takes up about twenty pages of the book. Your mileage may vary, however, and, in any case, it is easily ignored: Ultraviolet Grasslands is easy enough to use with any OSR game, and not particularly moreso with 5E. (With 3E you’d probably need to adjust some of the skill check DCs.)

My last quibble will be that the discoveries are under-developed, being more adventure seeds for the GM to develop than full-fledged content that’s ready to be run at the table. (But considerably less so than most hexcrawl products you may be familiar with, so take my critique with a grain of salt.)

Is any of this to say that you shouldn’t run out and buy Ultraviolet Grasslands the Black City?

Good lord, no! You absolutely should!

Take your first step with the Introduction, but then you need to LEAP into the full book, chock full of Rejec’s beautiful art and the incredible setting guide that will unlock all the glories of the grasslands.

Style: 5
Substance: 5

Author: Luka Rejec
Publisher: WizardThiefFighter Studios & Exalted Funeral Press
Cost – UVG Introduction: Free (PDF)
Cost – UVG & the Black City: $40 or $25 (PDF)
Page Count: 80 (Intro) / 200 (Black City)

UPDATE: As I was writing this review, word came out that Ultraviolet Grasslands and the Black City has been nominated for two 2020 ENnies Awards!